<?    class ErrorController extends Principio_Library_ControllerAction    {        public function errorAction()        {            $errors = $this->_getParam('error_handler');            switch ($errors->type) {                case Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_CONTROLLER:                case Zend_Controller_Plugin_ErrorHandler::EXCEPTION_NO_ACTION:                    // 404 error -- controller or action not found                    $this->getResponse()->setHttpResponseCode(404);                    $this->view->message = 'Page not found';                    break;                default:                    // application error                    $this->getResponse()->setHttpResponseCode(500);                    $this->view->message = 'Application error';                    break;            }            $this->view->exception = $errors->exception;            $this->view->request = $errors->request;        }    };?>